Some seemingly random people appear in a circular room, every now and then one of them is executed. They quickly realise there is a way to 'vote off' your fellow circle dwellers in a very terminal way.
It is not long before prejudices and biases start to arise. Someone notices more black people are getting zapped than white people. Coincidence? Some of these biases are played out very professionally with flair and drama, others are handled a bit clumsily leading to some very cringey dialogue.
This film lives and dies by how much you are prepared to invest into it.
If you think about the scenario logically, then a lot of the choices people make seem rash and rather stupid.
But if you can put yourself in the characters shoes, and imagine that you - staring wide eyed down the barrel of a gun - are about to be killed over some scum bag rapist, in reality wouldn't you want that extra two minutes of life over them - just on principle?
This is where the film needs to draw you in. The acting, lighting, effects and sound are all good enough. However, some of the characters aren't, forcing some of the actors into a corner they have to ham their way out off. Then the spell starts to crack.
If you can remove all distractions and try to engage your emotions and blot out the signals coming from the rational parts of your brain then this is very good for Netflix fodder.
I was fully prepared to have one of those stupid no answer endings. I was pleased to get a bit more than I expected.